Population interactions and ecosystem management

Question 1

population interactions structure?

Answer 1

they structure communities

Question 2

what is meant by interactions?

Answer 2

demographic mechanisms

Question 3

what level are animals managed at?

Answer 3

population level most common

Question 4

commensalism?

Answer 4

interaction benefits one population and one is not affected

Question 5

mutualism?

example?

Answer 5

interaction benefits both populations
gobis reduce predation on shrimp
shrimp burrows

Question 6

parasitism?

example?

Answer 6

interaction benefits one and negative for the other

isopod in mouths of fishes?

Question 7

whats effects can predation have on community structure?

Answer 7

there are flow on effects from changing numbers of predators - Myers (2007)
e.g. shark, ray and shellfish example

Question 8

competition?
where is it particularly important?
usually leads to?

Answer 8

mutual use of a limited resource
in tropics because i is species rich (due to environmental stability)
mutual extinction or coexistence

Question 9

what was the concept underlying managing past communities/ fisheries?

and what is different now in management techniques?

Answer 9

single species management
the idea of a keystone species

management now more of an interactionist approach

Question 10

what basis is the great barrier reef managed on?

Answer 10

on the basis of the services it provides

the economic value of its ecological services